Testcase CTE_REGTEST/Generic/4449624 from regression testsuite is failing with 1.3.1_14 onwards.

Steps to follow :
Compile and run the attached testcase.

Click the button to open a window. It will have a red box in it.
Iconify it and restore. 

The window should still have the focus (which is red). 

Without the fix, the restored window is blue (lost focus). 
With the fix, it is red.

Test shows window with blue box, means failed.
During investigation I observerd the test may pass if the operator inadvertently clicks in the de-iconized window before the test checks it. The period available for this is small, roughly one second or less.

Otherwise a consistent failure is observed.